21131289081

素因数分解:

$3^2\times 7^1\times {\mathrm{107}}^1\times {\mathrm{127}}^1\times {\mathrm{24683}}^1$

素因数の和:24930

約数の個数: 48

約数和(自身を含む): 35488088064

約数和(自身を除く): 14356798983

約数列:

[1, 3, 7, 9, 21, 63, 107, 127, 321, 381, 749, 889, 963, 1143, 2247, 2667, 6741, 8001, 13589, 24683, 40767, 74049, 95123, 122301, 172781, 222147, 285369, 518343, 856107, 1555029, 2641081, 3134741, 7923243, 9404223, 18487567, 21943187, 23769729, 28212669, 55462701, 65829561, 166388103, 197488683, 335417287, 1006251861, 2347921009, 3018755583, 7043763027, 21131289081]

約数ペア:

[(1, 21131289081), (3, 7043763027), (7, 3018755583), (9, 2347921009), (21, 1006251861), (63, 335417287), (107, 197488683), (127, 166388103), (321, 65829561), (381, 55462701), (749, 28212669), (889, 23769729), (963, 21943187), (1143, 18487567), (2247, 9404223), (2667, 7923243), (6741, 3134741), (8001, 2641081), (13589, 1555029), (24683, 856107), (40767, 518343), (74049, 285369), (95123, 222147), (122301, 172781)]